当前位置: X-MOL 学术Appl. Acoust. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Investigation of the Kaiser effect in anisotropic rocks with different angles by acoustic emission method
Applied Acoustics ( IF 3.4 ) Pub Date : 2021-04-01 , DOI: 10.1016/j.apacoust.2020.107831
Mehdi Kharghani , Kamran Goshtasbi , Majid Nikkah , Kaveh Ahangari

Abstract The utilize of Kaiser effect during acoustic emission testing is a novel approach for computing the amount of stress in the rock, which has been tremendously exploited due to the immense reduction in the cost and time of determining the in-situ stress. Several parameters influence the accuracy of the Kaiser effect. This paper investigates the effect of anisotropy on the Kaiser effect on the rock. For this purpose, acoustic emission effect in the uniaxial compression test and Brazilian tensile strength test on the Phyllites specimens with various angles of anisotropy (0, 30, 60, and 90°) has been conducted. The results demonstrate that in all uniaxial compression tests, the Felicity ratio of acoustic emission, which is defined as the ratio of the stress at which the Felicity effect occurs to the previously applied maximum stress, is close to one. In other words, the anisotropy does not have a significant effect on the values of the Felicity ratio. In Brazilian tensile strength tests, only the sample with zero-degree angle of anisotropy has a Felicity close to one, which means that the Kaiser effect in this condition is predicted more accurately. In addition, the results show that the uniaxial compression tests are more accurate in determining the Kaiser effect than Brazilian tensile strength tests.

中文翻译:

声发射法研究不同角度各向异性岩石中的凯撒效应

摘要 在声发射测试中利用凯撒效应是一种计算岩石应力量的新方法,由于大大减少了确定地应力的成本和时间,因此得到了极大的利用。有几个参数会影响 Kaiser 效应的准确性。本文研究了各向异性对岩石的凯撒效应的影响。为此,对具有各种各向异性角度(0、30、60 和 90°)的千枚岩试样进行了单轴压缩试验和巴西抗拉强度试验中的声发射效应。结果表明,在所有单轴压缩试验中,声发射的 Felicity 比定义为 Felicity 效应发生处的应力与先前施加的最大应力之比,接近一个。换句话说,各向异性对 Felicity 比率的值没有显着影响。在巴西抗拉强度测试中,只有各向异性角为零的样品的 Felicity 接近于 1,这意味着更准确地预测了这种条件下的凯撒效应。此外,结果表明,单轴压缩试验比巴西抗拉强度试验更准确地确定凯泽效应。
更新日期:2021-04-01
down
wechat
bug